210 REVIEWS 



The discussion of the soils is relatively less satisfactory than most 

 other portions of the book, but this is a subject so large in itself that 

 a satisfactory treatment could not be expected as a theme subordinate 

 to so broad a subject as the central topic of the book. 



The essence of several of the sections on weathering were published 

 in this Journal while the author was engaged upon the studies which 

 have taken form in this book and its readers are familiar with the 

 excellent method of their treatment and their substantial character. 



C. 



